1135679991 has 16 divisors (see below), whose sum is σ = 1571011200. Its totient is φ = 728886368.

The previous prime is 1135679959. The next prime is 1135680001. The reversal of 1135679991 is 1999765311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1135679991 - 2⁵ = 1135679959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135679291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11380 + ... + 48998.

It is an arithmetic number, because the mean of its divisors is an integer number (98188200).

Almost surely, 2^1135679991 is an apocalyptic number.

1135679991 is a deficient number, since it is larger than the sum of its proper divisors (435331209).

1135679991 is a wasteful number, since it uses less digits than its factorization.

1135679991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37998.

The product of its digits is 459270, while the sum is 51.

The square root of 1135679991 is about 33699.8514981891. The cubic root of 1135679991 is about 1043.3227035247.

The spelling of 1135679991 in words is "one billion, one hundred thirty-five million, six hundred seventy-nine thousand, nine hundred ninety-one".